IS 2544 provides test methods for porcelain (vitreous) enamel coatings — glass-like coatings fused onto metal at high temperature. Used for kitchen appliances, bathtubs, chemical equipment, and signboards. Tests cover adherence, chemical resistance, and thermal shock.
Methods of testing porcelain enamel coatings on metal substrates including adherence, acid resistance, alkali resistance, and thickness measurement.
Key Values
Acid resistance testCitric acid, 15 min, 25°C
Adherence test impactSteel ball drop from specified height
Practical Notes
! Porcelain enamel is extremely resistant to chemicals and heat — ideal for cooking appliances and chemical equipment.
! Adherence is the critical property — poor adherence leads to chipping during use.
! Impact test simulates real-world knocks and bumps — specified for cookware and appliances.